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Chromatin structure and DNA double-strand break responses in cancer progression and therapy

Oncogene volume 26, pages 7765–7772 (2007)Cite this article

Abstract

Defects in the detection and repair of DNA double-strand breaks (DSBs) have been causatively linked to tumourigenesis. Moreover, inhibition of DNA damage responses (DDR) can increase the efficacy of cancer therapies that rely on generation of damaged DNA. DDR must occur within the context of chromatin, and there have been significant advances in recent years in understanding how the modulation and manipulation of chromatin contribute to this activity. One particular covalent modification of a histone variant—the phosphorylation of H2AX—has been investigated in great detail and has been shown to have important roles in DNA DSB responses and in preventing tumourigenesis. These studies are reviewed here in the context of their relevance to cancer therapy and diagnostics. In addition, there is emerging evidence for contributions by proteins involved in mediating higher order structure to DNA DSB responses. The contributions of a subset of these proteins—linker histones and high-mobility group box (HMGB) proteins—to DDR and their potential significance in tumourigenesis are discussed.

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  1. MRC Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, UK

    J A Downs

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Downs, J. Chromatin structure and DNA double-strand break responses in cancer progression and therapy. Oncogene 26, 7765–7772 (2007). https://doi.org/10.1038/sj.onc.1210874

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